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CSV to JSON

Convert CSV data to JSON format instantly in your browser.

CSV Input

JSON Output

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CSV to JSON Converter

Convert CSV (Comma-Separated Values) to JSON format instantly with our free browser-based converter. Paste your CSV data or upload a file, and get properly formatted JSON output. The converter automatically detects headers and creates JSON objects with key-value pairs.

Supports tab-separated (TSV), semicolon-separated, and custom delimiters. All processing happens in your browser — your data never leaves your device.

How to use CSV to JSON

  • Paste your CSV data into the left input area.
  • Adjust options like headers vs. no-headers, or custom delimiters if needed.
  • Click Convert to see the JSON output on the right.
  • Use the Copy or Download buttons to save the result.

Features

  • Auto-detect headers as JSON keys — Treat the first row as property names automatically.
  • Support for TSV and custom delimiters — Handles CSV, TSV (tab-separated), semicolons, and more.
  • Pretty-print or minified JSON output — Format your JSON exactly how you need it.
  • Handle quoted fields and escaped characters — Properly parses complex CSV data.
  • Download result as .json file — Save the output directly.
  • 100% client-side processing — Perfect for private or sensitive data.

Frequently Asked Questions

How do I convert CSV to JSON format?

Paste your CSV data into the input field. The first row is used as JSON keys (headers), and each subsequent row becomes a JSON object. Click Convert to see the result instantly.

Does it handle CSV files with headers?

Yes. The first row is automatically treated as column headers and used as property names in the JSON output. You can toggle this off if your CSV has no header row.

Can I convert large CSV files?

Yes. Since processing happens in your browser, there are no server upload limits. Performance depends on your device, but files up to several megabytes convert quickly.